Work Energy And Power Question 266
Question: If a machine gun fires n bullets per second each with kinetic energy K, then the power of the machine gun is
Options:
A) $ {nK^{2}} $
B) $ \frac{K}{n} $
C) $ {n^{2}}K $
D) $ nK $
Show Answer
Answer:
Correct Answer: D
Solution:
[d] $ Power=\frac{totalwork done}{time} $
$ =\frac{\frac{1}{2}Mv^{2}}{t}=\frac{1}{2}( mv^{2} )n\because \frac{M}{t}=mn $
$ =kn\because [ K.E.K=\frac{1}{2}mv^{2} ] $
